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Guardian Interlock Systems has been a leading manufacturer of high-quality, cost-effective alcohol interlocks (BAIIDS/IIDS) for over 30 years. Our products are designed and manufactured to keep everyone safe while helping motorists get back on the road. Guardian began in 1985 when we introduced the first interlock device to the state of California. Since then, our company has grown and now has over 400 service centers in 26 states, providing drivers with friendly, timely, and knowledgeable assistance.





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